Papers by Syed Mohammad Hasan Ahmer
The Wear of Aluminum in the Presence of Polytron Additive in the Helix Lubricant; A Quantitative Analysis
We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The ob... more We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The objective of this study was to examine surface analysis and wear rate of the metal (aluminum). Wear studies were performed on the Pin-on-Disk (POD) tribometer with a fixed load of under dry air conditions. The wear of the metal surface with the base lubricant was found to be approximately. Upon the addition of polytron additive to the base oil, the surface scar of the metal showed a considerable decrease in its wear, which can be related to the chemical and/or physical changes and the formation of a hard surface film introduced by polytron in the system. In fact, the addition of by volume of polytron to the base oil reduced the value of wear to which indicates a pronounced decrement of one-third of the initial value of wear. The mass wear rate of the metal without the additive was estimated at which, in the presence of polytron additive, decreased by an order of magnitude, i.e.. Quantitati...
Synthesis of Nanoporous Silica in the Template of APG Lyotropic Liquid Crystal using Gamma Radiations
Using gamma irradiation method, nanoporous silica was templated in the cubic and hexagonal lyotro... more Using gamma irradiation method, nanoporous silica was templated in the cubic and hexagonal lyotropic geometries of alkyl Polyglucoside surfactant. The lyotropic phases were characterized by small angle X-ray scattering, polarizing microscope as well as rheometery technique. Under the transmission electron examination, the micrographs of the cubic phase revealed nano-sized cuboids in a size range of 3-5 nm. On the other hand, the pore size in the hexagonal phase was around 13.3 nm that rendered a wall thickness of approximately 6.6 nm to the hexagons. The radiation dose and template geometry play effective roles in the synthesis of nanoporous silica.
We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The ob... more We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The objective of this study was to examine surface analysis and wear rate of the metal (aluminum). Wear studies were performed on the Pin-on-Disk (POD) tribometer with a fixed load of 196. 2 under dry air conditions. The wear of the metal surface with the base lubricant was found to be approximately 75 .݊ݎ Upon the addition of polytron additive to the base oil, the surface scar of the metal showed a considerable decrease in its wear, which can be related to the chemical and/or physical changes and the formation of a hard surface film introduced by polytron in the system. In fact, the addition of 10% by volume of polytron to the base oil reduced the value of wear to 25 which indicates a pronounced decrement of one-third of the initial value of wear. The mass wear rate of the metal without the additive was estimated at 3.3 × 10 ିଷ ݉݃/݉݅݊ which, in the presence of polytron additive, decreased b...
Using gamma irradiation method, nanoporous silica was templated in the cubic and hexagonal lyotro... more Using gamma irradiation method, nanoporous silica was templated in the cubic and hexagonal lyotropic geometries of alkyl Polyglucoside surfactant. The lyotropic phases were characterized by small angle X-ray scattering, polarizing microscope as well as rheometery technique. Under the transmission electron examination, the micrographs of the cubic phase revealed nano-sized cuboids in a size range of 3 - 5 nm. On the other hand, the pore size in the hexagonal phase was around 13.3 nm that rendered a wall thickness of approximately 6.6 nm to the hexagons. The radiation dose and template geometry play effective roles in the synthesis of nanoporous silica.
Lal Said Jan, S.M.H. Ahmer, M.A. Siddig
We have investigated the effect of polytron as an
antiwear additive in the base oil Helix. The ob... more We have investigated the effect of polytron as an
antiwear additive in the base oil Helix. The objective of
this study was to examine surface analysis and wear rate of
the metal (aluminum). Wear studies were performed on the
Pin-on-Disk (POD) tribometer with a fixed load of
196.2 under dry air conditions. The wear of the metal
surface with the base lubricant was found to be
approximately 75
. Upon the addition of polytron
additive to the base oil, the surface scar of the metal
showed a considerable decrease in its wear, which can be
related to the chemical and/or physical changes and the
formation of a hard surface film introduced by polytron in
the system. In fact, the addition of 10% by volume of
polytron to the base oil reduced the value of wear to
25
which indicates a pronounced decrement of
one-third of the initial value of wear. The mass wear rate of
the metal without the additive was estimated at 3.3 ×
10
/
which, in the presence of polytron additive,
decreased by an order of magnitude, i.e. 8.33 ×
10
/
. Quantitative studies show a direct
correlation between the wear coefficient and wear rate.
We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The ob... more We have investigated the effect of polytron as an antiwear additive in the base oil Helix. The objective of this study was to examine surface analysis and wear rate of the metal (aluminum). Wear studies were performed on the Pin-on-Disk (POD) tribometer with a fixed load of under dry air conditions. The wear of the metal surface with the base lubricant was found to be approximately . Upon the addition of polytron additive to the base oil, the surface scar of the metal showed a considerable decrease in its wear, which can be related to the chemical and/or physical changes and the formation of a hard surface film introduced by polytron in the system. In fact, the addition of by volume of polytron to the base oil reduced the value of wear to which indicates a pronounced decrement of one-third of the initial value of wear. The mass wear rate of the metal without the additive was estimated at which, in the presence of polytron additive, decreased by an order of magnitude, i.e. . Quantitative studies show a direct correlation between the wear coefficient and wear rate.
Nonlinear laser spectroscopy
... Nonlinear laser spectroscopy. Post a Comment. CONTRIBUTORS: Author: Letokhov, VS. Author: Che... more ... Nonlinear laser spectroscopy. Post a Comment. CONTRIBUTORS: Author: Letokhov, VS. Author: Chebotaev, VP (b. 1938, d. ----. PUBLISHER: Springer-Verlag (Berlin and New York). SERIES TITLE: YEAR: 1977. PUB TYPE: Book (ISBN 0387080449 ). VOLUME/EDITION: ...
Introduction to nonlinear laser spectroscopy
... Introduction to nonlinear laser spectroscopy. Post a Comment. CONTRIBUTORS: Author: Levenson,... more ... Introduction to nonlinear laser spectroscopy. Post a Comment. CONTRIBUTORS: Author: Levenson, Marc D. ... PAGES (INTRO/BODY): xiv, 256 p. SUBJECT(S): Laser spectroscopy; Nonlinear optics. DISCIPLINE: No discipline assigned. LC NUMBER: QC454.L3 L48 1982. HTTP: ...
Foundations of laser spectroscopy
Presents the theoretical foundations of steady state laser spectroscopy at an elementary level. G... more Presents the theoretical foundations of steady state laser spectroscopy at an elementary level. General foundations and specific features of nonlinear effects are summarized, laser operation and laser spectroscopy are presented, and laser field fluctuations and the effects of field ...
Atomic and laser spectroscopy
J. Opt. Soc. Am, Jan 1, 1978
Daylight and its Spectrum, second edition ST Henderson John Wiley & Sons, New York, 1977.... more Daylight and its Spectrum, second edition ST Henderson John Wiley & Sons, New York, 1977. Pp x + 349. Price $29.50. This book contains substantially everything that you might rea-sonably want to know about daylight, insofar as it was known by anybody up to 1975. ...
Laser optoacoustic spectroscopy
Laser spectroscopy: Basic principles
Wolfgang Demtröder Universität Kaiserslautern Fachbereich Physik Erwin-Schrödinger-Strasse 46 676... more Wolfgang Demtröder Universität Kaiserslautern Fachbereich Physik Erwin-Schrödinger-Strasse 46 67663 Kaiserslautern Germany demtroed@rhrk.uni-kl.de ISBN 978-3-540-73415-4 e-ISBN 978-3-540-73418-5 DOI 10.1007/978-3-540-73418-5 Library of Congress Control ...
The principles of nonlinear optics
... NASA/STI Keywords: LASER APPLICATIONS, NONLINEAR OPTICS, OPTICAL PUMPING, BIREFRINGENCE, ELEC... more ... NASA/STI Keywords: LASER APPLICATIONS, NONLINEAR OPTICS, OPTICAL PUMPING, BIREFRINGENCE, ELECTRO-OPTICAL EFFECT, HARMONIC GENERATIONS, LASERSPECTROSCOPY, LIGHT SCATTERING, MAGNETO-OPTICS, OPTICAL WAVEGUIDES, RAMAN ...
High-resolution laser spectroscopy in fast beams
Optics Communications, Jan 1, 1976
Volume 17, number 3 OPTICS COMMUNICATIONS June 1976 HIGH-RESOLUTION LASER SPECTROSCOPY IN FAST BE... more Volume 17, number 3 OPTICS COMMUNICATIONS June 1976 HIGH-RESOLUTION LASER SPECTROSCOPY IN FAST BEAMS SL KAUFMAN Institut fcir Physik, Johannes Gutenberg-Universitdt, D-6500 Mainz, Fed. Rep. of Germany Received 3 March 1976 A method of ...
V Coherent Population Trapping in Laser Spectroscopy
Progress in Optics, Jan 1, 1996
... Progress in Optics Volume 35, 1996, Pages 257-354. doi:10.1016/S0079-6638(08)70531-6 | How to... more ... Progress in Optics Volume 35, 1996, Pages 257-354. doi:10.1016/S0079-6638(08)70531-6 | How to Cite or Link Using DOI Copyright © 1996 Elsevier Science BV All rights reserved. Permissions & Reprints. V Coherent Population Trapping in Laser Spectroscopy. ...
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Papers by Syed Mohammad Hasan Ahmer
Lal Said Jan, S.M.H. Ahmer, M.A. Siddig
antiwear additive in the base oil Helix. The objective of
this study was to examine surface analysis and wear rate of
the metal (aluminum). Wear studies were performed on the
Pin-on-Disk (POD) tribometer with a fixed load of
196.2 under dry air conditions. The wear of the metal
surface with the base lubricant was found to be
approximately 75
. Upon the addition of polytron
additive to the base oil, the surface scar of the metal
showed a considerable decrease in its wear, which can be
related to the chemical and/or physical changes and the
formation of a hard surface film introduced by polytron in
the system. In fact, the addition of 10% by volume of
polytron to the base oil reduced the value of wear to
25
which indicates a pronounced decrement of
one-third of the initial value of wear. The mass wear rate of
the metal without the additive was estimated at 3.3 ×
10
/
which, in the presence of polytron additive,
decreased by an order of magnitude, i.e. 8.33 ×
10
/
. Quantitative studies show a direct
correlation between the wear coefficient and wear rate.